A steam turbine rotor lifting tool

Abstract

The present invention relates to the field of lifting tools, and in particular to a steam turbine rotor lifting tool, comprising a crossbeam, on which sliding units are symmetrically arranged; a lifting unit is installed on the sliding unit, and the sliding unit is used to adjust the distance between two lifting units; the sliding unit comprises a slider sleeved on the crossbeam, and the slider can move along the length direction of the crossbeam; the lifting unit is installed on the lower surface of the slider; in the present invention, a constraint component is set to squeeze the lower half of the lifting rope, and the constraint component is installed on the slider, so that the constraint component is connected into a whole, the constraint component squeezes and can constrain the lifting rope, shortening the swingable length of the lifting rope, thereby reducing the swing amplitude of the lifting rope and the steam turbine rotor, thereby reducing the possibility of the steam turbine rotor hitting surrounding equipment or workers.

Description

Technical Field

[0001] The invention relates to the technical field of lifting tools, in particular to a steam turbine rotor lifting tool. Background Art

[0002] A steam turbine is a rotary steam-powered device and is the main equipment in modern thermal power plants. It is relatively large in size and is usually hoisted by a gantry crane during production or maintenance. The rotor of the steam turbine also needs to be hoisted into the turbine casing or removed from the turbine casing by a gantry crane.

[0003] The gantry crane is connected with a lifting mechanism through a winding mechanism. A crossbeam is arranged below the lifting mechanism. The steam turbine rotor is hoisted on the crossbeam through a lifting rope. The lifting mechanism realizes the vertical rising and falling movement of the steam turbine rotor by pulling the crossbeam up and down.

[0004] The lower end of the gantry crane is moved by its own traveling mechanism, which can realize movement in the axial direction of the turbine rotor.

[0005] The winding motor in the winding mechanism cooperates with the winding I-wheel to pull the crossbeam to move longitudinally and horizontally, that is, to move radially along the turbine rotor. For the turbine rotor, the longitudinal and horizontal movement will cause the turbine rotor to swing at the moment of movement due to its own inertia, that is, the turbine rotor will swing back and forth to its sides. The swinging of the turbine rotor will cause the turbine rotor to hit the surrounding equipment, which may cause safety accidents in serious cases.

[0006] Therefore, a steam turbine rotor lifting tool is proposed to address the above problems. Summary of the invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the problem of the turbine rotor swinging during hoisting in the prior art, which may cause safety accidents.

[0008] In order to solve the above technical problems, the present invention provides a steam turbine rotor lifting tool, comprising a crossbeam, the crossbeam is connected to the lifting mechanism of the gantry crane through two sets of steel cables, and sliding units are symmetrically arranged on the crossbeam;

[0009] The sliding unit is mounted with a hanging unit, and the sliding unit is used to adjust the distance between the two hanging units; the sliding unit comprises a slider sleeved on the crossbeam, and the slider can move along the length direction of the crossbeam; the hanging unit is mounted on the lower surface of the slider;

[0010] The hoisting unit includes a hoisting component and a constraint component; the hoisting component includes a hoisting rope, both ends of which are connected to a slider, and a constraint component is symmetrically arranged on the outside of the hoisting rope. The constraint component is installed on the slider, and the constraint component can constrain the swing amplitude of the turbine rotor hoisted on the hoisting rope.

[0011] In one embodiment of the present invention, each of the constraint components includes two T-shaped rods, the transverse parts of the T-shaped rods are fixedly connected to the two sides of the slider, the vertical parts of the T-shaped rods are connected to a runway-shaped guide rail, a suspension rope is arranged on one side of the guide rail, the lower end of the guide rail is inclined and extended below the slider, a pressure plate is arranged on the other side of the guide rail, sliding holes are provided on both sides of the pressure plate, a pin is arranged at the position where the sliding hole and the guide rail coincide, one end of the pin extends to the suspension rope position, and one end of the pin is fixedly connected to a roller with a groove, the suspension rope is attached to the groove on the roller, the other end of the pin extends into the sliding hole, and the other end of the pin is provided with an anti-slip plate;

[0012] Two hydraulic cylinders are symmetrically arranged above the pressing plate, the cylinder bodies of the two hydraulic cylinders are respectively fixedly connected to the lower surface of the sliding block, and the output ends of the hydraulic cylinders are vertically fixedly connected to the upper surface of the pressing plate.

[0013] In one embodiment of the present invention, a support rod is fixedly connected between the lower ends of the cylinder bodies of adjacent hydraulic cylinders; a support rod is also fixedly connected between the inner side walls of the lower ends of adjacent guide rails.

[0014] In one embodiment of the present invention, the sliding unit further includes a driving assembly and an execution assembly; the driving assembly includes a motor fixedly connected to the end of the beam, the output end of the motor is connected to a gear set, the gear set is provided with two output ends, the two output ends of the gear set are respectively located on both sides of the end of the beam, and the output end of the gear set is fixedly connected to a screw rod, which is transmission-connected to the execution assembly;

[0015] The actuator assembly includes a traction tube, the inner ring of the traction tube is connected to the screw rod for transmission, the outer ring of the traction tube is provided with a strip-shaped protrusion, and the protrusion is arranged along the axial direction of the traction tube, the traction tube passes through the through holes symmetrically opened on the slider, the inner ring of the through hole is provided with a limiting groove adapted to the protrusion, the protrusion is embedded in the limiting groove, and anti-slip parts are also provided at both ends of the traction tube, and the anti-slip parts are located on the outside of the slider.

[0016] In one embodiment of the present invention, the outer ring of the traction tube is clearance-matched with the inner ring of the through hole, and a gap is left between the raised surface and the inner surface of the limiting groove.

[0017] In one embodiment of the present invention, a discharge assembly for releasing the sling is further provided on the lower surface of the slider; the discharge assembly comprises a fixed plate symmetrically fixed to the lower surface of the slider, a hanging rod is rotatably connected to the fixed plate, the ends of the hanging rod extend to the front and rear sides of the slider, and the ends of the hanging rod are arranged in an arc shape, and the sling is hung on the arc portion of the hanging rod;

[0018] The outer ring at the middle position of the hanging rod is fixedly connected with a gear ring, the gear ring is meshed with a gear, the gear is connected to the output end of the motor, and the motor is fixedly connected to the lower surface of the sliding block.

[0019] In one embodiment of the present invention, an extrusion block is provided on one end face of the gear ring; a limit block is provided on the side wall of the fixing plate opposite to the extrusion block, and the limit block can limit the rotation of the gear ring and make the end of the hanging rod tilt upward.

[0020] In one embodiment of the present invention, a touch switch is provided on the side wall of the limit block opposite to the extrusion plate, and the touch switch is used to control the start and stop of the motor.

[0021] In one embodiment of the present invention, each of the pin shaft outer rings is provided with annular rotation grooves at positions opposite to the guide rail and the slide hole, and roller bodies are arranged in an array on the inner circumference of the rotation grooves.

[0022] In one embodiment of the present invention, the sling comprises a nylon sling and a steel rope, and the steel rope is arranged in the inner layer of the nylon sling.

[0023] The above technical solution of the present invention has the following advantages compared with the prior art:

[0024] 1. In the present invention, the constraint component is configured to squeeze the lower half of the suspension rope, and the constraint component is installed on the slider, so that the constraint component is connected as a whole. The constraint component squeezes and can constrain the suspension rope, shortening the swingable length of the suspension rope, thereby reducing the swing amplitude of the suspension rope and the turbine rotor, thereby reducing the possibility of the turbine rotor colliding with surrounding equipment or personnel.

[0025] 2. In the present invention, the outer ring of the traction tube and the inner ring of the through hole are gap-matched, and a gap is left between the raised surface and the inner surface of the limiting groove, which plays a role in giving way and reducing wear, thereby extending the service life of the turbine rotor lifting tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Figure 1 It is a three-dimensional diagram of the cooperation between the lifting tool and the steam turbine rotor in the present invention;

[0028] Figure 2 It is a front view of the cooperation between the lifting tool and the steam turbine rotor in the present invention;

[0029] Figure 3 A three-dimensional diagram of the lifting tool in the present invention;

[0030] Figure 4 is a three-dimensional diagram of the crossbeam in the present invention;

[0031] Figure 5 It is a first-view stereoscopic diagram of the hanging unit in the present invention;

[0032] Figure 6 A second perspective stereogram of the hanging unit in the present invention;

[0033] Figure 7 It is a front view of the hoisting unit in the present invention;

[0034] Figure 8 is a three-dimensional diagram of the restraining assembly of the present invention;

[0035] Fig. 9 It is a front view of the restraining assembly in the present invention;

[0036] Fig.10 It is a three-dimensional diagram of the unloading assembly in the present invention;

[0037] Fig.11 It is a front view of the unloading assembly in the present invention;

[0038] Fig.12 A top view of the unloading assembly of the present invention;

[0039] Fig.13 is a three-dimensional diagram of the slider in the present invention;

[0040] Fig.14 is a stereoscopic diagram of the traction tube in the present invention;

[0041] Fig.15 is a cross-sectional view of the traction tube in the present invention;

[0042] Fig.16 It is a stereoscopic view of the pin in the present invention.

[0043] In the figure: 101, turbine rotor; 1, cross beam; 2, slider; 3, lifting rope; 4, T-bar; 5, guide rail; 6, pressure plate; 7, sliding hole; 8, pin shaft; 9, roller; 10, anti-slip plate; 11, hydraulic cylinder; 12, support rod; 13, motor; 14, screw rod; 15, traction tube; 16, protrusion; 17, through hole; 18, limit groove; 19, anti-slip part; 20, fixing plate; 21, hanging rod; 22, gear ring; 23, gear; 24, motor; 25, extrusion block; 26, limit block; 27, roller body. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0045] Reference Figure 1 - Fig.16 , a steam turbine rotor lifting tool, comprising a crossbeam 1, the crossbeam 1 is connected to the lifting mechanism of the gantry crane through two sets of steel cables, and sliding units are symmetrically arranged on the crossbeam 1;

[0046] The sliding unit is mounted with a hanging unit, and the sliding unit is used to adjust the distance between the two hanging units; the sliding unit comprises a slider 2 sleeved on the beam 1, and the slider 2 can move along the length direction of the beam 1; the hanging unit is mounted on the lower surface of the slider 2;

[0047] The hoisting unit includes a hoisting component and a constraint component; the hoisting component includes a hoisting rope 3, both ends of which are connected to the slider 2, and the constraint component is symmetrically arranged on the outer side of the hoisting rope 3, and the constraint component is installed on the slider 2, and the constraint component can constrain the swing amplitude of the steam turbine rotor 101 hoisted on the hoisting rope 3;

[0048] In this embodiment, the traveling mechanism of the gantry crane may be composed of a driving wheel and a ground rail arranged at the bottom of the gantry crane, and the driving wheel can drive the gantry crane to move along the ground rail to realize the axial movement of the steam turbine rotor 101; the lifting mechanism may be composed of an electric hoist and a steel cable, and the crossbeam 1 is connected to the electric hoist through the steel cable to realize the lifting and lowering of the steam turbine rotor 101; and the electric hoist is connected to the main beam of the gantry crane to set a winding mechanism; the winding mechanism may be composed of a winding motor and a winding I-shaped wheel, which drives the electric hoist and the crossbeam 1 to move along the length direction of the main beam of the gantry crane, that is, to realize the longitudinal movement of the steam turbine rotor 101;

[0049] Two pairs of lifting ropes 3 are used to lift the turbine rotor 101. Specifically, the upper ends of the lifting ropes 3 are connected to the slider 2, and the lower end rings of the lifting ropes 3 are sleeved on the shaft of the turbine rotor 101. As to whether the lifting ropes 3 can be effectively sleeved on the shaft and whether the center of gravity of the turbine rotor 101 can be placed between the two pairs of lifting ropes 3, this is achieved by sliding the slider 2 connected to the crossbeam 1. The slider 2 is moved and the distance between the two sliders 2 is adjusted so that the lower ends of the lifting ropes 3 can be effectively sleeved on the shaft of the turbine rotor 101 instead of on the blades on the turbine rotor 101. At the same time, the position of the slider 2 on the crossbeam 1 is adjusted so that the center of gravity of the turbine rotor 101 is placed in the middle of the two sliders 2. The dead weight of the turbine rotor 101 can be evenly distributed on the two pairs of lifting ropes 3, and the two pairs of lifting ropes 3 are evenly stressed, which can ensure the safety of lifting.

[0050] Before the steam turbine rotor 101 is lifted off the ground support or off the steam turbine casing, the lifting mechanism is pre-controlled to perform the first lifting stroke, that is, the lifting rope 3 is stretched and tightened, and then the constraint component is operated, the constraint component can squeeze the lower half of the lifting rope 3, and then the lifting mechanism is controlled to perform the second lifting stroke to directly lift the steam turbine rotor 101 to a specified height; the constraint component is installed on the slider 2, so that the constraint component and the crossbeam 1 are connected as a whole, the constraint component squeezes and can constrain the lifting rope 3, shortens the swingable length of the lifting rope 3, reduces the swing amplitude of the lower end of the lifting rope 3, and also reduces the swing amplitude of the lifting rope 3 and the steam turbine rotor 101, thereby reducing the possibility of the steam turbine rotor 101 hitting surrounding equipment or personnel.

[0051] Reference Figure 1 - Figure 3 ,as well as Figure 5 - Fig. 9 Each of the constraint components includes two T-shaped rods 4, the transverse parts of the T-shaped rods 4 are fixedly connected to the two sides of the slider 2, the vertical parts of the T-shaped rods 4 are connected to the runway-shaped guide rails 5, a suspension rope 3 is arranged on one side of the guide rail 5, the lower end of the guide rail 5 is inclined and extended to the bottom of the slider 2, a pressure plate 6 is arranged on the other side of the guide rail 5, sliding holes 7 are arranged on both sides of the pressure plate 6, a pin 8 is arranged at the position where the sliding hole 7 coincides with the guide rail 5, one end of the pin 8 extends to the position of the suspension rope 3, and one end of the pin 8 is fixedly connected to a roller 9 with a groove, the suspension rope 3 is attached to the groove on the roller 9, the other end of the pin 8 extends into the sliding hole 7, and the other end of the pin 8 is provided with an anti-slip plate 10;

[0052] Two hydraulic cylinders 11 are symmetrically arranged above the pressing plate 6, and the cylinder bodies of the two hydraulic cylinders 11 are respectively fixed to the lower surface of the slider 2, and the output ends of the hydraulic cylinders 11 are vertically fixed to the upper surface of the pressing plate 6; in this embodiment, the transverse part of the T-shaped rod 4 is fixed to the side wall of the slider 2 by bolts, and can also be directly welded and fixed, and the vertical part of the T-shaped rod 4 is connected to the guide rail 5, and the guide rail 5 is tilted to guide the downward movement of the pin shaft 8, and the lifting mechanism is controlled to perform the first stroke lifting, and the lifting rope 3 is stretched and tightened, and then the hydraulic cylinder 11 is driven, and the hydraulic cylinder 11 pushes the pressing plate 6 downward, and the sliding hole 7 on the pressing plate 6 squeezes the pin shaft 8 downward, and the pin shaft 8 moves obliquely downward along the guide rail 5, and at the same time, the roller 9 on the pin shaft 8 squeezes the lifting rope 3, that is, the two adjacent rollers 9 squeeze the lower half of the lifting rope 3, such as Figure 6 As shown, at this time, the suspension rope 3 and the constraint assembly tend to be integrated, and the roller 9 squeezes the suspension rope 3 downward, which can reduce the swing amplitude of the suspension rope 3, that is, the distance from the equilibrium position to the maximum offset position of the steam turbine rotor 101 is reduced, and the swing amplitude of the steam turbine rotor 101 is reduced, which also reduces the possibility of the steam turbine rotor 101 hitting the surrounding equipment or personnel.

[0053] After the lifting is completed, the hydraulic cylinder 11 pulls up the pressure plate 6 to reset it, and the lower end of the lifting rope 3 can be removed from the shaft of the turbine rotor 101.

[0054] Reference Figure 8 and Fig. 9A support rod 12 is fixedly connected between the lower ends of the cylinder bodies of the adjacent hydraulic cylinders 11; a support rod 12 is also fixedly connected between the inner side walls of the lower ends of the adjacent guide rails 5; a support rod 12 is arranged between two adjacent hydraulic cylinders 11 to improve the stability and integrity between the two hydraulic cylinders 11, and a support rod 12 is arranged between two adjacent guide rails 5 to improve the integrity, improve the squeezing stability of the constraint assembly on the suspension rope 3, and the synchronous execution of the two adjacent hydraulic cylinders 11 can be further optimized through a synchronous valve, which is a valve specially used for synchronous control of two hydraulic cylinders in a hydraulic system. The synchronous valve can achieve synchronous control by controlling the flow in the hydraulic system to keep the movement speed of the two adjacent hydraulic cylinders 11 consistent.

[0055] Reference Figure 1 - Figure 4 ,as well as Fig.13 - Fig.15 , the sliding unit also includes a driving component and an execution component; the driving component includes a motor 13 fixedly connected to the end of the beam 1, the output end of the motor 13 is connected to a gear set, the gear set is provided with two output ends, the two output ends of the gear set are respectively located on both sides of the end of the beam 1, and the output end of the gear set is fixedly connected to a screw rod 14, and the screw rod 14 is transmission-connected to the execution component;

[0056] The actuator assembly includes a traction tube 15, the inner ring of the traction tube 15 is connected to the screw rod 14 for transmission, the outer ring of the traction tube 15 is provided with a strip-shaped protrusion 16, and the protrusion 16 is arranged along the axial direction of the traction tube 15, the traction tube 15 passes through a through hole 17 symmetrically opened on the slider 2, and the inner ring of the through hole 17 is provided with a limiting groove 18 adapted to the protrusion 16, and the protrusion 16 is embedded in the limiting groove 18, and both ends of the traction tube 15 are also provided with anti-slipping parts 19, and the anti-slipping parts 19 are located on the outer side of the slider 2; the output end of the motor 13 is connected to a gear set, and the two output ends of the gear set are connected to the screw rod 14, the screw rod 14 is driven to rotate by the motor 13, and can pull or push the slider 2 to move along the length direction of the beam 1, the screw rod 14 is connected to the traction tube 15, and the anti-slipping parts 19 at both ends of the traction tube 15 are against the slider 2, pulling or pushing the slider 2 to move, thereby realizing the adjustment of the distance between the two suspension ropes 3, so that the suspension ropes 3 can adapt to turbine rotors 101 of different specifications.

[0057] Reference Figure 1 - Figure 4 ,as well as Fig.13 - Fig.15, the outer ring of the traction tube 15 and the inner ring of the through hole 17 are clearance-matched, and a gap is left between the surface of the protrusion 16 and the inner surface of the limiting groove 18; considering the sliding arrangement between the slider 2 and the crossbeam 1, the slider 2 or the crossbeam 1 is worn, and the wear will cause the gap between the slider 2 and the crossbeam 1 to increase, then the slider 2 will squeeze the screw rod 14 downward, so that the transmission between the screw rod 14 and the traction tube 15 is blocked, and the wear between the screw rod 14 and the traction tube 15 will also increase. For this reason, the outer ring of the traction tube 15 and the inner ring of the through hole 17 are clearance-matched, and a gap is left between the surface of the protrusion 16 and the inner surface of the limiting groove 18, which plays a role in giving way and reducing wear, thereby extending the service life of the turbine rotor 101 lifting tool.

[0058] Reference Figure 1 - Figure 3 ,as well as Figure 6 - Fig.12 The lower surface of the slider 2 is also provided with a discharge assembly for releasing the hanging rope 3; the discharge assembly includes a fixed plate 20 symmetrically fixed to the lower surface of the slider 2, and a hanging rod 21 is rotatably connected to the fixed plate 20, and the ends of the hanging rod 21 extend to the front and rear sides of the slider 2, and the ends of the hanging rod 21 are arranged in an arc shape, and the hanging rope 3 is hung on the arc portion of the hanging rod 21;

[0059] The outer ring of the middle position of the hanging rod 21 is fixedly connected with a gear ring 22, the gear ring 22 is meshed with a gear 23, the gear 23 is connected to the output end of the motor 24, and the motor 24 is fixedly connected to the lower surface of the slider 2;

[0060] Each pair of suspension ropes 3 provided in this embodiment is composed of two annular ropes, and the two annular ropes are connected and arranged in the shape of a number "8", the upper annular rope loop is arranged on the hanging rod 21, and the lower annular rope is suspended on the shaft of the turbine rotor 101;

[0061] The hanging rod 21 provided in the present embodiment is used for hanging the hanging rope 3, and considering the weight of the hanging rope 3 and the convenience of removing and replacing the hanging rope 3, a discharging assembly that can automatically remove the hanging rope 3 is provided, and also considering the safe distance between the crossbeam 1 and the turbine rotor 101, so as to prevent the crossbeam 1 from touching the blades on the turbine rotor 101; if the turbine rotor 101 has been hoisted to the support frame on the ground, the hanging rope 3 needs to be removed, and the crossbeam 1 is moved down to a height that the staff can reach. If the blade diameter is large, the crossbeam 1 cannot be moved down to a height that the staff can reach. The discharging assembly provided can remove the hanging rope 3 without moving the crossbeam 1 downward, and the driving motor 24 drives the gear 23 to rotate, the gear 23 drives the gear ring 22 to rotate, and the gear ring 22 drives the hanging rod 21 to rotate. Fig.11As shown, it only needs to be rotated ninety degrees and rotated in the direction of the motor 24 so that the arc-shaped portion of the hanging rod 21 rotates downward. At this time, the hanging rope 3 can slide off the hanging rod 21 to realize the unloading of the hanging rope 3; after the hanging rope 3 is removed, the beam 1 can be moved away. At this time, the beam 1 can be moved down to a height that the staff can reach, and the motor 24 drives the hanging rod 21 to rotate in the opposite direction to reset, and hang the hanging rope 3.

[0062] Reference Fig.10 - Fig.12 A squeezing block 25 is provided on one end face of the toothed ring 22; a limit block 26 is provided on the side wall of the fixing plate 20 opposite to the squeezing block 25, and the limit block 26 can limit the rotation of the toothed ring 22 and make the end of the hanging rod 21 tilted upward; the limit block 26 is arranged to cooperate with the squeezing block 25 to limit the rotation angle of the hanging rod 21 during the resetting process, so that the arc-shaped parts at both ends of the hanging rod 21 are tilted upward, so that the hanging rope 3 can be stably hung, thereby ensuring the safety of the lifting.

[0063] Reference Fig.10 - Fig.12 A touch switch is provided on the side wall opposite to the limit block 26 and the extrusion plate 6, and the touch switch is used to control the pause of the motor 24; the touch switch arranged on the limit block 26 is linked with the motor 24 and is used to control the pause of the motor 24. When the hanging rod 21 rotates to reset, the extrusion block 25 squeezes the touch head of the touch switch. At this time, it indicates that the hanging rod 21 has been rotated to reset, and the arc-shaped parts at both ends of the hanging rod 21 are tilted upward and no longer need to be rotated, so that the reset rotation angle of the hanging rod 21 can be accurately controlled, ensuring that the arc-shaped parts at both ends of the hanging rod 21 can stably hang the hanging rope 3, and also providing extrusion protection between the extrusion block 25 and the limit block 26.

[0064] Reference Fig.16 Each of the outer rings of the pin shaft 8 is provided with a ring-shaped rotation groove at the position opposite to the guide rail 5 and the sliding hole 7, and a roller body 27 is arranged in an array on the inner circumference of the rotation groove; the roller body 27 is arranged on the surface of the pin shaft 8, so that the relative movement between the pin shaft 8 and the guide rail 5 is smoother, and the relative movement between the pin shaft 8 and the pressure plate 6 is smoother, and the pressure plate 6 can stably press down the pin shaft 8.

[0065] Reference Figure 1 The lifting rope 3 includes a nylon lifting belt and a steel rope, and the steel rope is arranged in the inner layer of the nylon lifting belt; using the nylon belt as the outer layer of the lifting rope 3 can protect the shaft surface of the turbine rotor 101, and the steel rope is arranged inside the nylon belt to assist the tensile strength of the nylon belt, so that the lifting rope 3 can lift a heavier turbine rotor 101.

[0066] Working principle: In this embodiment, the traveling mechanism of the gantry crane may be composed of a driving wheel and a ground rail arranged at the bottom of the gantry crane, and the driving wheel can drive the gantry crane to move along the ground rail to realize the axial movement of the steam turbine rotor 101; the lifting mechanism may be composed of an electric hoist and a steel cable, and the crossbeam 1 is connected to the electric hoist through the steel cable to realize the lifting and lowering of the steam turbine rotor 101; and the electric hoist is connected to the main beam of the gantry crane to set a winding mechanism; the winding mechanism may be composed of a winding motor and a winding I-shaped wheel, which drives the electric hoist and the crossbeam 1 to move along the length direction of the main beam of the gantry crane, that is, to realize the longitudinal movement of the steam turbine rotor 101;

[0067] Two pairs of lifting ropes 3 are used to lift the turbine rotor 101. Specifically, the upper ends of the lifting ropes 3 are connected to the slider 2, and the lower end rings of the lifting ropes 3 are sleeved on the shaft of the turbine rotor 101. As to whether the lifting ropes 3 can be effectively sleeved on the shaft and whether the center of gravity of the turbine rotor 101 can be placed between the two pairs of lifting ropes 3, this is achieved by sliding the slider 2 connected to the crossbeam 1. The slider 2 is moved and the distance between the two sliders 2 is adjusted so that the lower ends of the lifting ropes 3 can be effectively sleeved on the shaft of the turbine rotor 101 instead of on the blades on the turbine rotor 101. At the same time, the position of the slider 2 on the crossbeam 1 is adjusted so that the center of gravity of the turbine rotor 101 is placed in the middle of the two sliders 2. The dead weight of the turbine rotor 101 can be evenly distributed on the two pairs of lifting ropes 3, and the two pairs of lifting ropes 3 are evenly stressed, which can ensure the safety of lifting.

[0068] Before the steam turbine rotor 101 is lifted off the ground support or off the steam turbine casing, the lifting mechanism is controlled in advance to perform the first lifting stroke, that is, the lifting rope 3 is stretched and tightened, and then the constraint component is operated, the constraint component can squeeze the lower half of the lifting rope 3, and then the lifting mechanism is controlled to perform the second lifting stroke to directly lift the steam turbine rotor 101 to a specified height; the constraint component is installed on the slider 2, so that the constraint component and the crossbeam 1 are connected as a whole, the constraint component squeezes and can constrain the lifting rope 3, shortens the swingable length of the lifting rope 3, reduces the swing amplitude of the lower end of the lifting rope 3, and also reduces the swing amplitude of the lifting rope 3 and the steam turbine rotor 101, thereby reducing the possibility of the steam turbine rotor 101 hitting the surrounding equipment or personnel;

[0069] In this embodiment, the transverse portion of the T-shaped rod 4 is fixed to the side wall of the slider 2 by bolts, and can also be directly welded and fixed. The vertical portion of the T-shaped rod 4 is connected to the guide rail 5, and the guide rail 5 is tilted to guide the downward movement of the pin shaft 8. The lifting mechanism is controlled to perform the first stroke lifting, the lifting rope 3 is stretched and tightened, and then the hydraulic cylinder 11 is driven. The hydraulic cylinder 11 pushes the pressure plate 6 downward, and the sliding hole 7 on the pressure plate 6 squeezes the pin shaft 8 downward, and the pin shaft 8 moves obliquely downward along the guide rail 5. At the same time, the roller 9 on the pin shaft 8 squeezes the lifting rope 3, that is, the two adjacent rollers 9 squeeze the lower half of the lifting rope 3, such as Figure 6As shown, at this time, the suspension rope 3 and the constraint assembly tend to be integrated, and the roller 9 squeezes the suspension rope 3 downward, which can reduce the swing amplitude of the suspension rope 3, that is, the distance from the equilibrium position to the maximum offset position of the steam turbine rotor 101 is reduced, and the swing amplitude of the steam turbine rotor 101 is reduced, which also reduces the possibility of the steam turbine rotor 101 hitting the surrounding equipment or personnel.

[0070] After the lifting is completed, the hydraulic cylinder 11 pulls up the pressure plate 6 to reset it, and the lower end of the lifting rope 3 can be removed from the shaft of the steam turbine rotor 101;

[0071] A support rod 12 is arranged between two adjacent hydraulic cylinders 11 to improve the stability and integrity between the two hydraulic cylinders 11, and a support rod 12 is arranged between two adjacent guide rails 5 to improve the integrity, improve the extrusion stability of the constraint assembly on the suspension rope 3, and the synchronous execution of the two adjacent hydraulic cylinders 11 can be further optimized by a synchronous valve, which is a valve specially used for synchronous control of two hydraulic cylinders in a hydraulic system. The synchronous valve can control the flow in the hydraulic system to keep the movement speed of the two adjacent hydraulic cylinders 11 consistent, thereby achieving synchronous control;

[0072] The output end of the motor 13 is connected to a gear set, and the two output ends of the gear set are connected to a screw rod 14. The screw rod 14 is driven to rotate by the motor 13 and can pull or push the slider 2 to move along the length direction of the beam 1. The screw rod 14 is connected to the traction tube 15. The anti-slip parts 19 at both ends of the traction tube 15 are against the slider 2, pulling or pushing the slider 2 to move, thereby adjusting the distance between the two suspension ropes 3, so that the suspension ropes 3 can adapt to steam turbine rotors 101 of different specifications;

[0073] Considering the sliding arrangement between the slider 2 and the crossbeam 1, the slider 2 or the crossbeam 1 is worn, and the wear will cause the gap between the slider 2 and the crossbeam 1 to increase, then the slider 2 will press the screw rod 14 downward, so that the transmission between the screw rod 14 and the traction tube 15 is blocked, and the wear between the screw rod 14 and the traction tube 15 will also increase. For this reason, the outer ring of the traction tube 15 and the inner ring of the through hole 17 are gap-matched, and a gap is left between the surface of the protrusion 16 and the inner surface of the limiting groove 18, which plays a role in giving way and reducing wear, thereby extending the service life of the steam turbine rotor 101 lifting tool;

[0074] Each pair of suspension ropes 3 provided in this embodiment is composed of two annular ropes, and the two annular ropes are connected and arranged in the shape of a number "8", the upper annular rope loop is arranged on the hanging rod 21, and the lower annular rope is suspended on the shaft of the turbine rotor 101;

[0075] The hanging rod 21 provided in the present embodiment is used for hanging the hanging rope 3, and considering the weight of the hanging rope 3 and the convenience of removing and replacing the hanging rope 3, a discharging assembly that can automatically remove the hanging rope 3 is provided, and also considering the safe distance between the crossbeam 1 and the turbine rotor 101, so as to prevent the crossbeam 1 from touching the blades on the turbine rotor 101; if the turbine rotor 101 has been hoisted to the support frame on the ground, the hanging rope 3 needs to be removed, and the crossbeam 1 is moved down to a height that the staff can reach. If the blade diameter is large, the crossbeam 1 cannot be moved down to a height that the staff can reach. The discharging assembly provided can remove the hanging rope 3 without moving the crossbeam 1 downward, and the driving motor 24 drives the gear 23 to rotate, the gear 23 drives the gear ring 22 to rotate, and the gear ring 22 drives the hanging rod 21 to rotate. Fig.11 As shown, it only needs to be rotated 90 degrees and rotated in the direction of the motor 24, so that the arc-shaped portion of the hanging rod 21 rotates downward, and the hanging rope 3 can slide off the hanging rod 21 to realize the unloading of the hanging rope 3; after the hanging rope 3 is removed, the crossbeam 1 can be moved away, and the crossbeam 1 can be moved down to a height that can be reached by the staff, and the motor 24 drives the hanging rod 21 to rotate in the opposite direction to reset, and hang the hanging rope 3;

[0076] The limit block 26 cooperates with the extrusion block 25 to limit the rotation angle of the hanging rod 21 during the resetting process, so that the arc-shaped parts at both ends of the hanging rod 21 are tilted upward, so that the hanging rope 3 can be stably hung to ensure the safety of the lifting;

[0077] The touch switch arranged on the limit block 26 is linked with the motor 24 and is used to control the pause of the motor 24. When the hanging rod 21 rotates to reset, the squeezing block 25 squeezes the touch head of the touch switch, which means that the hanging rod 21 has been rotated to reset. The arc-shaped parts at both ends of the hanging rod 21 are tilted upward and no longer need to be rotated, so that the reset rotation angle of the hanging rod 21 can be accurately controlled, ensuring that the arc-shaped parts at both ends of the hanging rod 21 can stably hang the hanging rope 3, and also providing squeezing protection between the squeezing block 25 and the limit block 26;

[0078] A roller body 27 is arranged on the surface of the pin shaft 8, so that the relative movement between the pin shaft 8 and the guide rail 5 is smoother, and the relative movement between the pin shaft 8 and the pressure plate 6 is smoother, and the pressure plate 6 can stably press down the pin shaft 8;

[0079] Using nylon belt as the outer layer of the lifting rope 3 can protect the shaft surface of the turbine rotor 101, while the steel rope is arranged inside the nylon belt to assist the tensile strength of the nylon belt, so that the lifting rope 3 can lift a heavier turbine rotor 101.

[0080] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A steam turbine rotor lifting tool, comprising a crossbeam (1), the crossbeam (1) being connected to a lifting mechanism of a gantry crane via two sets of steel cables, characterized in that: The crossbeam (1) is symmetrically provided with sliding units; A hanging unit is installed on the sliding unit, and the sliding unit is used to adjust the distance between the two hanging units; the sliding unit comprises a sliding block (2) sleeved on the crossbeam (1), and the sliding block (2) is capable of moving along the length direction of the crossbeam (1); the hanging unit is installed on the lower surface of the sliding block (2); The hoisting unit comprises a hoisting component and a restraining component; the hoisting component comprises a hoisting rope (3), both ends of the hoisting rope (3) are connected to the slider (2), restraining components are symmetrically arranged outside the hoisting rope (3), the restraining components are installed on the slider (2), and the restraining components can restrain the swing amplitude of the steam turbine rotor (101) hoisted on the hoisting rope (3); Each of the restraining components comprises two T-shaped rods (4), the transverse portions of the T-shaped rods (4) being fixedly connected to both sides of the slider (2), the vertical portions of the T-shaped rods (4) being connected to a runway-shaped guide rail (5), a suspension rope (3) being arranged on one side of the guide rail (5), the lower end of the guide rail (5) being arranged to extend obliquely below the slider (2), a pressure plate (6) being arranged on the other side of the guide rail (5), sliding holes (7) being arranged on both sides of the pressure plate (6), a pin shaft (8) being arranged at a position where the sliding hole (7) and the guide rail (5) overlap, one end of the pin shaft (8) extending to the position of the suspension rope (3), and one end of the pin shaft (8) being fixedly connected to a roller (9) with a groove, the suspension rope (3) being attached to the groove on the roller (9), the other end of the pin shaft (8) extending into the sliding hole (7), and the other end of the pin shaft (8) being provided with an anti-slip plate (10); Two hydraulic cylinders (11) are symmetrically arranged above the pressing plate (6); the cylinder bodies of the two hydraulic cylinders (11) are respectively fixedly connected to the lower surface of the sliding block (2); and the output ends of the hydraulic cylinders (11) are vertically fixedly connected to the upper surface of the pressing plate (6).

2. A steam turbine rotor lifting tool according to claim 1, characterized in that: A support rod (12) is fixedly connected between the lower ends of the cylinder bodies of adjacent hydraulic cylinders (11); a support rod (12) is also fixedly connected between the inner side walls of the lower ends of adjacent guide rails (5).

3. A steam turbine rotor lifting tool according to claim 1, characterized in that: The sliding unit further comprises a driving assembly and an execution assembly; the driving assembly comprises a motor (13) fixedly connected to the end of the crossbeam (1); the output end of the motor (13) is connected to a gear set, the gear set is provided with two output ends, the two output ends of the gear set are respectively located on both sides of the end of the crossbeam (1), and the output end of the gear set is fixedly connected to a screw rod (14), the screw rod (14) is transmission-connected to the execution assembly; The actuator assembly comprises a traction tube (15), the inner ring of the traction tube (15) is connected to the screw rod (14), the outer ring of the traction tube (15) is provided with a strip-shaped protrusion (16), and the protrusion (16) is arranged along the axial direction of the traction tube (15), the traction tube (15) passes through a through hole (17) symmetrically provided on the slider (2), the inner ring of the through hole (17) is provided with a limiting groove (18) adapted to the protrusion (16), the protrusion (16) is embedded in the limiting groove (18), and both ends of the traction tube (15) are also provided with an anti-slip portion (19), and the anti-slip portion (19) is located on the outer side of the slider (2).

4. A steam turbine rotor lifting tool according to claim 3, characterized in that: The outer ring of the traction tube (15) is clearance-matched with the inner ring of the through hole (17), and a gap is left between the surface of the protrusion (16) and the inner surface of the limiting groove (18).

5. A steam turbine rotor lifting tool according to claim 3, characterized in that: The lower surface of the slider (2) is also provided with a discharge assembly for releasing the suspension rope (3); the discharge assembly comprises a fixing plate (20) symmetrically fixed to the lower surface of the slider (2), a hanging rod (21) being rotatably connected to the fixing plate (20), the end of the hanging rod (21) extending to the front and rear sides of the slider (2), and the end of the hanging rod (21) is arranged in an arc shape, and the suspension rope (3) is hung on the arc portion of the hanging rod (21); A toothed ring (22) is fixedly connected to the outer ring at the middle position of the hanging rod (21), a gear (23) is meshed with the toothed ring (22), and the gear (23) is connected to the output end of a motor (24), and the motor (24) is fixedly connected to the lower surface of the slider (2).

6. A steam turbine rotor lifting tool according to claim 5, characterized in that: An extrusion block (25) is provided on one end surface of the gear ring (22); a limit block (26) is provided on a side wall of the fixing plate (20) opposite to the extrusion block (25); the limit block (26) can limit the rotation of the gear ring (22) and make the end of the hanging rod (21) tilt upward.

7. A steam turbine rotor lifting tool according to claim 6, characterized in that: A touch switch is provided on the side wall of the limit block (26) opposite to the extrusion plate (6), and the touch switch is used to control the pause of the motor (24).

8. A steam turbine rotor lifting tool according to claim 1, characterized in that: The outer ring of each pin shaft (8) is provided with a ring-shaped rotation groove at a position corresponding to the guide rail (5) and the slide hole (7), and a roller body (27) is arranged in an array on the inner circumference of the rotation groove.

9. A steam turbine rotor lifting tool according to claim 5, characterized in that: The sling (3) comprises a nylon sling and a steel rope, wherein the steel rope is arranged in the inner layer of the nylon sling.

Images